<abstract xmlns="http://www.w3.org/1999/xhtml"><p>In Tunisia especially in the Medjerda watershed the recurring of floods becoming more remarkable. In order to limit this risk, several studies were performed to examine the Medjerda hydrodynamic. The analysis of results showed that the recurrences of floods at the Medjerda watershed is strongly related to the sediment transport phenomena. Initially, a one dimensional modelling was conducted in order to determine the sediment transport rate, and to visualize the river morphological changes during major floods. In continuity of this work, we will consider a two-dimensional model for predicting the amounts of materials transported by the Medjerda River. The goal is to visualize the Medjerda behaviour during extreme events and morphological changes occurred following the passage of the spectacular flood of January 2003. As a conclusion for this study, a comparative analysis was performed between 1D and 2D models results. The objective of these comparisons is to visualize the benefits and limitations of tested models. The analysis of the results demonstrate that 2D model is able to calculate the flow variation, sediment transport rates, and river morphological changes during extreme events for complicated natural domains with high accuracy comparing with 1D Model.</p></abstract>

In Tunisia especially in the Medjerda watershed the recurring of floods becoming more remarkable. In order to limit this risk, several studies were performed to examine the Medjerda hydrodynamic. The analysis of results showed that the recurrences of floods at the Medjerda watershed is strongly related to the sediment transport phenomena. Initially, a one dimensional modelling was conducted in order to determine the sediment transport rate, and to visualize the river morphological changes during major floods. In continuity of this work, we will consider a two-dimensional model for predicting the amounts of materials transported by the Medjerda River. The goal is to visualize the Medjerda behaviour during extreme events and morphological changes occurred following the passage of the spectacular flood of January 2003. As a conclusion for this study, a comparative analysis was performed between 1D and 2D models results. The objective of these comparisons is to visualize the benefits and limitations of tested models. The analysis of the results demonstrate that 2D model is able to calculate the flow variation, sediment transport rates, and river morphological changes during extreme events for complicated natural domains with high accuracy comparing with 1D Model.

Floods effects on rivers morphological changes application to the Medjerda River in Tunisia

University of Carthage, National Institute of Agronomy of Tunisia, Laboratory of Water Science & Technology, Tunis, Tunisia.

University of Toulouse, National Polytechnic Institute of Toulouse, Institute of Fluid Mechanics, Toulouse, France.

Journal of Hydrology and Hydromechanics

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

In Tunisia especially in the Medjerda watershed the recurring of floods becoming more remarkable. In order to limit this risk, several studies were performed...

Floods effects on rivers morphological changes application to the Medjerda River in Tunisia

Publié en ligne: 26 janv. 2016

Pages: 56 - 66

Reçu: 14 juil. 2015

Accepté: 08 oct. 2015

DOI: https://doi.org/10.1515/johh-2016-0004

Mots clés
Floods, Hydrodynamics, Sediment transport, Modelling, River morphology

© 2016 Mohamed Gharbi et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Floods effects on rivers morphological changes application to the Medjerda River in Tunisia

Publié en ligne: 26 janv. 2016

Pages: 56 - 66

Reçu: 14 juil. 2015

Accepté: 08 oct. 2015

DOI: https://doi.org/10.1515/johh-2016-0004

Mots clésFloods, Hydrodynamics, Sediment transport, Modelling, River morphology

© 2016 Mohamed Gharbi et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Mots clés
Floods, Hydrodynamics, Sediment transport, Modelling, River morphology